JavaScript DOM Tutorial

This section covers the JavaScript Document Object Model (DOM) and shows you how to manipulate DOM elements effectively.

Section 1. Getting started #

createElement() – create a new element.
appendChild() – append a node to a list of child nodes of a specified parent node.
textContent – get and set the text content of a node.
innerHTML – get and set the HTML content of an element.
innerHTML vs. createElement – explain the differences between innerHTML and createElement when it comes to creating new elements.
DocumentFragment – learn how to compose DOM nodes and insert them into the active DOM tree.
after() – insert a node after an element.
append() – insert a node after the last child node of a parent node.
prepend() – insert a node before the first child node of a parent node.
insertAdjacentHTML() – parse a text as HTML and insert the resulting nodes into the document at a specified position.
replaceChild() – replace a child element by a new element.
cloneNode() – clone an element and all of its descendants.
removeChild() – remove child elements of a node.
insertBefore() – insert a new node before an existing node as a child node of a specified parent node.
insertAfter() helper function – insert a new node after an existing node as a child node of a specified parent node.

HTML Attributes & DOM Object’s Properties – understand the relationship between HTML attributes & DOM object’s properties.
setAttribute() – set the value of a specified attribute on a element.
getAttribute() – get the value of an attribute on an element.
removeAttribute() – remove an attribute from a specified element.
hasAttribute() – check if an element has a specified attribute or not.

JavaScript events – introduce you to the JavaScript events, the event models, and how to handle events.
Handling events – show you three ways to handle events in JavaScript.
Page Load Events – learn about the page load and unload events.
load event – walk you through the steps of handling the load event originating from the document, image, and script elements.
DOMContentLoaded – learn how to use the DOMContentLoaded event correctly.
beforeunload event – guide you on how to show a confirmation dialog before users leave the page.
unload event – show you how to handle the unload event that fires when the page is completely unloaded.
Mouse events – how to handle mouse events.
Keyboard events – how to deal with keyboard events.
Scroll events – how to handle scroll events effectively.
scrollIntoView – learn how to scroll an element into view.
Focus Events – cover the focus events.
haschange event – learn how to handle the event when URL hash changes.
Event Delegation – is a technique of levering event bubbling to handle events at a higher level in the DOM than the element on which the event originated.
dispatchEvent – learn how to generate an event from code and trigger it.
Custom Events – define a custom JavaScript event and attach it to an element.
MutationObserver – monitor the DOM changes and invoke a callback when the changes occur.

JavaScript Form – learn how to handle form submit event and perform a simple validation for a web form.
Radio Button – show you how to write the JavaScript for radio buttons.
Checkbox – guide you on how to manipulate checkbox in JavaScript.
Select box – learn how to handle the select box and its option in JavaScript.
Add / Remove Options – show you how to dynamically add options to and remove options from a select box.
Removing Items from <select> element conditionally – show you how to remove items from a <select> element conditionally.
Handling change event – learn how to handle the change event of the input text, radio button, checkbox, and select elements.
Handling input event – handle the input event when the value of the input element changes.